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&quot;I started in August 2005 a project to emulate a Cisco 7200 on a traditionnal PC. Now, it also supports Cisco 3600 series (3620, 3640 and 3660), 3700 series (3725, 3745) and 2600 series (2610 to 2650XM, 2691).&quot;

Thats right! you can actually boot cisco IOS for the above platforms on a normal PC!!! If you don't know what an IOS is you can stop reading this tutorial right here(see footnote 1).

you can read all about it here
www[dot]ipflow[dot]utc[dot]fr/index.php/Cisco_7200_Simulator

for non developers (users) the real action is here
7200emu.hacki.at/

there is a very active community there so please go there and search the forums in case you have problems, please excuse my tone, i'm just a BT3 n00b and not capabale of giving technical assistance, however if you direct your queries to the BT3 community, you may get assisted. So feel free to use the thread to ask others here for help,i will not respond to any queries whatsoever consider yourself warned!!!
If you find the tutorial usefull / helpfull please leave a comment and i will dedicate time to improve it. Suggestions Improvements Welcomed
================================================== ==================================

This tutorial is based on GNS3-0.3.2 version which is the latest to date, if their is a newer version these instructions may not be applicable, but like i said all your problems can be solved here
7200emu[dot]hacki[dot]at

you can read about gns3 on their home page
www[dot]gns3[dot]net

and of coz go get GNS3-0.3.2 from from the download area
www[dot]gns3[dot]net/download

whilst there you might notice a M$ windows all in one package, just know that you will get better performance with a Linux System period.

Although there could be a way of getting this done via slapt-get, swaret etc
for me installing each package by hand was a good way to familiarising
myself with BT3 (slack environment) so for the really lazy sorry.

use install packages from the current directry and install all 4 packages.

OK now we are ready to install GNS3

to install change to directory where the files were unpacked and type
python setup.py install

(in case you forgot we did download the linux compressed GNS3-0.3.2-src.tar.gz
and unpacked it at the begining of the tutorial )

bt ~ #cd /GNS3-0.3.2
bt GNS3-0.3.2 #python setup.py install

you will see all sorts of stuff zoom on your screen
when it finishes run gns3 by typing at the prompt
bt ~ #gns3

If all went well A window Titled GNS3 should come up.

Now we need to download the dynamips binary from

www[dot]ipflow[dot]utc[dot]fr/dynamips/dynamips-0.2.8-RC2-x86.bin

put it in a directory eg
/dynamips

On the GNS3 Window go to Edit Menu --> Preferences --> Dynamips
Under Settings in the executable path put the path to the binary eg
/dynamips/dynamips-0.2.8-RC2-x86.bin

Click the test Button at the bottom.
if all went well you will get Dynamips Succesufully Started.

OK we are done!
get the documentation www[dot]gns3[dot]net/documentation
a valid IOS and go configure your routers!!!

You need a valid IOS Image to configure networks and study for CCNA/CCNP/CCIE
Also note that pix versin 7.x is also emulated but that is beyond
the scope of this tutorial.
if you want to emulate pix goto the PEMU section at
7200emu.hacki.at